Container for extrusion-machines.



PATBNTED MAY 12, 1908.

INVENTOR FIG UNITED sTATEs PATENT oEEIcE.

GEORGE H.'BENJAMIN, OF NEW YORK,`N. Y., ASSIGNOR TO COE BRASS MANUFACTURING COMPANY, A CORPORATION OF CONNECTICUT.

CONTAINER Fon Ex'iRUsIoN-MACHINES.

Specification of Letters Patent.

Patented May 12, 1908.

Application filed November 20, 1907. Serial No. 403,050.

i tween the cylinder and the lining a body of heat non-conducting material; (b) by arranging around a centrally dis osed tube or lining, a series of concentric tuffes, each'tube of successively greater diameter so -as to leave aspace between it and the lining or tube over which' it is placed, with one end ofsuch. tubes arranged to overlap to form a built-up end wall, and forcing between the tubes and the lining bodies of heat nonvconducting material, and closing the op o-- site end of the tubes by a screw-threa ed racticeto these types of container consists 1n the fact that when pressure is exerted upon the metal to be extruded within the container, the frictional adhesion of such metal .to the inner s rface of the lining of the container forces the lining forward in the container, and as the forward end of the lining is usually conical in shape, it tends to spread and burst the container; or in the case of the built-u form (b) to carry the concentric tubes ongitudinally forward, thus rapidly destroying the container.

T o overcome the objection above stated, I have devised a new form of container, which is'shown in the accompanying drawings, in which f Figure 1 is a vertical section of the container as a whole; Fig. 2 a vertical section of two of the tubes of the container, illustrating the relation of the helically disposed ribs von the interior and exterior of a tube, and their relation to similar helically disposediribs'on ad'acent tubes Fig. 3 is a transverse section.

eferring to the drawings: 5 indicates the interior` tube or lining of the container in which the metal to be extruded is placed.. This tube or lining lis slightly longer than the tubes of the container and is provided on its GEORGE I-IILLARn gward from right to left.

`exterior with a rejecting rib 6 disposed helically and inclining from above down- Surrounding the lining 5 is a tube 7, of larger diameter, but of less length.l The left hand end of this tube, is thicker than the body of the tube, and is arranged'to rest upon the left hand end of the outer` surface of the lining V5, and to project above the outer periphery of the tube 7 By this arrangement a space a, which is closed at the left' hand end, is formed between the llining 5 and the tube 7 The inner periphery vof the tube 7 is provided with the projecting rib 8, which is helically disposed in the same direction as the helical rib 6 on the exterior lsurfacel of the 'lining 5, and is provided on its outer(periphery with the rib 9 which is helically sposed in a direction opposite to that of the rib 8, that is-the rib 9 is inclined from above downward from left to right. Surrounding the tube 7 is a second tube 10. This tube is substantially similar in construction to the tube 7 and is provided with ribs 1 1 and 12, the rib 11 corresponding in direction to the rib 9 of the tube 7, and the rib 12 corresponding in direction to the rib 8 of the tube 7.

Between the tubes 7 and 1G is a space b. .Surrounding the tube 10 is an inclosing tube 13 of greater thickness, the left hand end of fwhich co-acts with the ends ofthe tubes 7 vand 10 to form asbuilt-up wall to close the spaces between the lining 5 and tube 7, tube 7 and tube 10, the tube. 10 and outer tube 13. The right hand end of'thisv tube is provided with a thread 14 and is adapted to receive a ring 15 which closes the right hand. end of Athe container. On' the inner periphery of .the tube 13 is .the helically disposed rib 16, which conformsin direction to the rib 12 on the outer periphery of the tube 10. Between theltubes 10 and 13 is a space c. Introduced into the spaces a, b, c, arebodies of Vheat insulating lmaterial which are introduced in a granular and moist state and rammed by very heavy pressure into place. This material may conveniently consist of a mixture of finely divided trap rock, an alkaline salt, such as soda, and a binding material, such as/siccative oil,- which will char under a high temperature but not burn.

In practice it has been found that by arranging the projecting ribs 6, 8, 9, 11, 12, 16, 'as described, the heat insulating material may be forced into position and when in position will co-act with such ribs to p`revent the lining 5, as well as the tubes 7 and 10, from being moved longitudinally forward under the pressure exerted by the pusher of the extruding machine transmitted through jthe metal body to be extruded.

, It will be observed that the helical ribs in the iirst space, a, and third space, c,.have an inclination opposite to those of the space b.

In other words-,.-the inclination of the .dis-

posed ribs in the spaces a, c are from above downward and from right. to left, and in the space b from above downward, yfrom left to right. By reasdn of this arrangement the wedge action of the ribs in the spaces a and c is counteracted by the oppositely irectioned Wedge action of the ribs in the space b. In arranging the ribs I prefer that they shall be staggered as shown, along opposing surfaces.

Having thus claim: v

1. A- container comprising a lining, hav,ing a helical rib on its outer periphery, a series of concentric tubes surrounding said lining and described my invention, I

having helical ribs on their inner and outer peripheries,` and a containingv tube having a helical rib on its inner periphery; A .Y 2. A container comprising a lining, having a helical rib on its outer periphery, a series of concentric tubes surrounding said lining and having helicalribs on their inner and outer peripheries, said ribs disposed in opposite ydirections, and a containing tube having afhelical rib. on its inner periphery.

3. A container comprising a a helical rib on its outer periphery, a series of spaced concentric tubes surrounding said liningl and having helical ribs on their inner and outer peripheries, anda spaced containing tube having a helical rib, onits inner periphery, thel helices in eachspace being disposed in the same. directionl and in an opposite direction to the next adjoining space.-

lining, having surface inclined from above downward from.

left to-right, a tube of greater diameter surrounding said lining and having ahelical rib 011A its inner surface inclined from above downward from right to left, and on its outer surface from left to right, a second tube of larger diameter than the first named tube surroundingtnhe iirst named tube and having a helical rib on its inner surface inclined from above downward from left to ri ht and on its outer surface from rightto eft, and a third tube of larger diameter than the second tube having a helical rib onits inner surface inclined downward from right to left, said first, second and third ynamed tubes having one end arranged to have abuilt-up wall and compacted insulating material introduced between said linings and said tubes, and a closure for the end of the tubes opposite to the built-up wall.l

6. A container for anextrusion machine, "consisting of a series of concentric spaced tubes provided with circumferential helical ribs, compacted insulating material between said tubes whereby said helical ribs and said `Vcompacted material will co-act' to prevent longitudinal movement of the tubes relative to each other when under strain. f

In testimony whereof, I afIX my signature, in the presence of two witnesses.

GEO. H. BENJAMIN. Witnesses:

M. TURiynR, ELIZABETH BARNETT 

